Incinerating plant.



T. F. BENNETT.

INCINERATING PLANT.

APPLICATION FILED IuNE 6.1914.

NILW

2 SHEETS-SHEET l.

wenor# l l YY lll.

COLUMBIA PLANGGRAPH C0., WASHINGTON. D. c,

T. F. BENNETT.

INCINERATING PLANT.

APPLICATION FILED .IuIIE 6.19I4.

Patented Oct. 26, 1915.

2- SHEETS-SHEET 2.

Lli.

COLUMBIA PLANOGRAIH co..\vAsHINuToN. D. c.

THOMAS F. BENNETT, 0F PHILADELPHIA, PENNSYLVANIA.

INCINERATING PLANT.

Specification of Letters Patent.

Patented @et 26, 1915.

Application led J une 6, 1914. Serial No. 843,431.

T0 all 'whom t may concern.'

Be it known that I, THOMAS F. BEN- Nnr'r, a citizen of the UnitedStates, residing in Philadelphia, Pennsylvania, have invented certainImprovements in Incinerating Plants, of which the following is aspeciiication.

One object of my invention is to provide a novel form of furnaceparticularly designed for the incineration of garbage, sludge and othercombustible materials, the various parts being so constructed andarranged that the apparatus is eilicientl under operating conditions, issubstantial as well as convenient to operate, and is`not likely to getout of repair nor require more than a minimum of attention.

A further object of my invention is to provide an incinerating planthaving the above noted characteristics which shall be relativelyinexpensive to construct and capable of being operated with a minimum oflabor; it being also desired that the plant shall include novel meansfor causing the evaporation of liquid and also a novel arrangement ofparts for receiving and preliminarily draining, and drying garbage andsludge as well as evaporating water.

These objects and other advantageous ends I secure as hereinafter setforth, reference being had to the accompanying drawings, in which Figure1 is a vertical section illustrating the detail construction of a plantconstructed according to my invention, and Fig; 2 is a vertical sectionon the line a-a Fig. 1.

Referring to the above drawings, 1 represents a suitable foundation forthe furnace proper and 2 the foundation for a stack 3 connected to saidfurnace as hereafter described. On the foundation 1 is erected thefurnace setting which includes a back wall 4, a front wall 5 and sidewalls 6. The front wall extends upwardly to and terminates immediatelyunder a dumping platform 7, having projecting forwardlyy from it achamber forming a starting furnace 8 and an ash pit 9 separated by agrate 10, there being fire ash doors 11 and 12 provided for these twocompartments. The bottom of the ash pit is preferably provided with asuitable concrete foundation or floor 13 ordinarily at a higher levelthan the foundation 1.

A vertical partition 15 extends transversely between the side walls 6 soas to provide a front or main furnace chamber 14 and a rear flue 16, thebottom of said cham ber being formed by a hearth 17 inclined at a slightangle downwardly from the partition 15 to the rear end of the grate 10where the rea-r of the starting furnace 8 opens into the main furnace soas to communicate directly with the lower front part thereof. l

Spaced away from the hearth 17 though adjacent and immediately below thesame is an evaporating hearth 18 preferably inclined in an oppositedirection from the socalled garbage hearth 17 from the front to the rearof the furnace structure.

As shown in Fig. 2, I form in the partition 15 any desired and suitablenumber of vertical passages or slots 19 leading into the flue 16, therebeing in the present instance two sets of these so that the products ofcombustion and other gases arising from the chamber 14 are free to passinto said flue.

Elongated slots 20 or other suitably formed openings are also providedin the hearth 17 as well as in that part of the partition 15 between thetwo hearths 17 and 18, so that gases are free to pass through the Yformer hearth into the space above the hearth 18 and thence into theflue 16. Y

At about the level of the hearth 18 I provide a horizontal partition 21extending from one of the side walls 6 about half way toward the otherand in the space under the hearth 18 and said horizontal partition Iplace a vertical baiiie or partition 22 which extends from the rear wall4 to within a short distance of the front wall 5. The flue 16 is thuscontinued through a iiue 23 under the hearth 18 and thence through asecond flue 24 also under said hearth and the partition 21, through thepartition 15 and the rear wall 4 tothe intake or bottom cham ber 25 ofthe stack 3.

Above the flue 16 is mounted a receptacle 26 for the reception andtemporary storage, draining, drying and evaporating of water in garbageand sludge to be incinerated and this is preferably formed of a metalliccas ing extending forwardly from the rear wall 4 for the entire width ofthe furnace and provided with one or more doors 27 hinged to its topportion and inclined downwardly and forwardly to within a short distanceof the level of the dumping platform 7. In the present instance I haveshown two of these doors, but obviously any desired nu1nber may beemployed without departing from my invention.

From the back wall of the casing 26 the bottom 28 thereof is inclineddownwardly and forwardly to the front face of the partition 15 and abovethis is mounted a more steeply inclined grate 28a from the forward edgeof which a gate 29 extends upwardly and forwardly to the level of theplatform 7; This gate slides in suitable guideways and has a pluralityof racks 43 mounted on its under face in position to be engaged by gearwheels 44 fixed to a transversely extending shaft 45 which may be drivenfrom a hand wheel 46 through a vertically extending shaft 47 andsuitable connecting gear- Y ing.

From opposite sides of the upper part of the casing 26 a conduit 34extends downwardly to the upper part of the flue 16 so that any gasesarising from the material in said casing when the furnace is inoperation, are drawn from the upper portion thereof into the said-flueand thence to the stack. The lower'forward portion of the inclinedbottom 28 has formed in it an elongated opening extending for the fullwidth of the furnace and provided with a grating or screen immediatelyabove the top edge of the partition 15. The latter as well as theremainder of the furnace lining is prefer- Y ably formed of fire brickor other refractory Ymaterial and said partition has a series of vvformed inthe hearth 17.

vertical passages or ducts 36 leading from the space immediately underthe grating to the rear ends of similar passages or ducts 37 At theforward ends of these latter passages are vertical passages 38 whoselower ends communicate with ducts or passages 39 in the bricksconstituting the evaporating hearth 18 and the lower ends of theselatter passages open directly into the flues 23 and 24. Both of the twosets of passages 37 and 39 preferably have clean-out openings and ventsleading into them and the upper part of the incinerating chamber alsohas an opening 40 normally closed by a door 41 above the startingfurnace 8, whereby access may be had to its interior when desired.

Under conditions of operation, the garbage to be incinerated isdelivered onto the platform 7 and thence into the container 26 throughthe openings of the doors 27, the discharge gate 29 being in the closedposition shown in Fig. 1. Previous to the placing of garbage in thecasing 26, a fire is started in the furnace 8 on the grate 10 so thatsaid furnace is thoroughly heated, as is also 'the combustion chamber ormain furnace 14.A rThereafter by opening the gate 29 to a suitableextent, the material in the casing 26 is allowed to fall or is drawnonto the hearth 17, it being noted, however, that previously a largeproportion of the liquid which is usually present passes through thegrate 28LL and is directed by the inclined bottom 28 through the grating35 into the upper ends of the conduits 36. Ordinarily this liquid wouldflow through and into the conduits 37,38 and 39 but under operatingconditions the hot gases from the fire in the furnace 8 and later thoseresulting from the intense combustion in the main furnace 14, heat thepartition 15 and hearths 1T and 18 to such a high point, either directlyor in passing through the fines 16, 23 and 24, that all of said liquidis completely evaporated before it can reach the lower end of the.conduit 39. After the material on the hearth 17 has been heated by thehot gases from-the furnace 8, to the point of ignition it is draggedforward onto the grate 10 in said furnace where it is mixed with coal orother fuel and its combustion is completed. This dried material isadmitted to the hearth -17 as above described from time to time in anydesired quantities, and is thereafter delivered to the starting furnace8 where it is completely burnt.

Under the above noted conditions the hot products of combustion andother gases arising either from the furnace 8 or from the maincombustion chamber 14, pass through the openings in the partition 15,into the iue 16 and with any gases which may be drawn from the upperpart of the casing 26 through the conduit 34, pass downwardly into theflue 23, thence Howing forwardly and around the front of the partition22 into the flue 24, from which they flow to the stack 3. Obviouslythese gases maintain both the partition 15 and the two hearths 17 and 18at a high temperature, so that the liquid delivered from the casing 26onto the plate 28 and into the passages 36, as well as that passing tothe hearth 17, is evaporated. F rom time to time any ashes or othernon-combustible material collecting on the hearth 17 or grate 10 may bedrawn forward and removed through the fire door 11, although vif desiredthe inclination of said hearth may be such that the ashes, etc., areautomatically caused to flow into the furnace.

It is to be noted that I preferably so construct the gate 29 that itsface within the combustion chamber of the main furnace 14 has aprotective covering of asbestos or other refractory material, therebyeffectually preventing injury from the high temperature in said chamber.

As shown in Fig. 1, the bottom chamber 25 of the stack has the generalform of the top of a bottle, being provided with a relatively narrowneck where it enters the main chamber of said stack. My object inproviding this construction is to set up a whirling motion of the gasescoming from the conduit 24, so that any sparks or heavy incandescentparticles will be deposited before the gases pass into and out of thestack proper.

The passages or ducts 36,37, 38, and 39 are preferably formed by metalpipes mounted in a suitable manner within the refractory walls orhearths 15, 17 and 18.

I claim 1. The combination in an incinerating plant of a furnace; and areceiving casing mounted above said furnace in position to dischargethereinto, there being a conduit extending vertically through a sidewall of the furnace so as to be heated by the products of combustion andconnected to receive liquid flowing from the receiving casing.

2. The combination in an incinerating plant of a furnace having avertical wall including conduits extending longitudinally therethrough;a hearth having conduits therein connected to the passages of the wall;with a receiving casing mounted to discharge solid material into thefurnace and having a liquid outlet connected to deliver to the passagesin the wall.

3. The combination in an incinerating plant of a furnace having a hearthand a wall provided with connecting passages; an evaporating hearthhaving passages connected with the passages of said first hearth; with areceiving casing mounted to deliver into the furnace and provided with aliquid outlet discharging into the passages in the furnace wall.

4. The combination in an incinerating plant of an inclosing structure; afurnace therein; a wall for the furnace cooperating with said structureto form a vertically eX- tending flue immediately adjacent said furnaceand having passages therein; said wall being provided with openingsconnecting the line and the furnace; a receiving casing having aninclined bottom over the flue and provided with a liquid outlet at itslower end draining into the passages in the wall; and a gate forcontrolling the passage of material from the casing into the furnace.

5. The combination in an incinerating plant of a base and Walls forminga setting; a partition dividing the chamber formed by said setting intoa furnace and a Hue and provided with openings and liquid receivingconduits; a stack connected to said Hue; a receiving casing having aninclined bottom over the flue and arranged to deliver liquid into theconduits of the partition; with an inclined door for the casing slidablymounted in the setting and co-acting with the lower edge of said bottomwhen in its closed position.

6. The combination in an incinerating plant of a base and walls forminga setting; a partition having openings therethrough and dividing thechamber formed by said setting into a furnace and a flue, a stackconnected to the flue; a receiving casing having an inclined bottom overthe flue; and an inclined door for the casing slidably mounted in thesetting and co-acting with the lower edge of said bottom when in itsclosed position, said furnace having a hearth provided with passages andthe partition likewise having passages connecting with those of thehearth and connected with the lower part of the receiving casing.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

THOMAS F. BENNETT.

Witnesses:

WILLIAM E. BRADLEY, WM. A. BARR.

C'opies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patenti, Washington, B. C.

